diff --git a/src/tools/qtwaylandscanner/qtwaylandscanner.cpp b/src/tools/qtwaylandscanner/qtwaylandscanner.cpp
index 24977a2f234..05f00beee7b 100644
--- a/src/tools/qtwaylandscanner/qtwaylandscanner.cpp
+++ b/src/tools/qtwaylandscanner/qtwaylandscanner.cpp
@@ -467,6 +467,9 @@ bool Scanner::process()
     if (m_xml->hasError())
         return false;
 
+    printf("// This file was generated by qtwaylandscanner\n");
+    printf("// source file is %s\n\n", qPrintable(m_protocolFilePath));
+
     for (auto b : qAsConst(m_includes))
         printf("#include %s\n", b.constData());